Localization of noise source and primary reflections in a room using a spherical array and aggregate beamforming technique

Aggregate beamforming is described as an alternative to conventional beamforming for reducing the hardware complexity of arrays with many elements. A 32-element spherical array has been designed for the analysis of directional and spatial variations of sound fields in rooms. These two technologies are combined for the purpose of localizing early reflections within a room. The alternative beamforming method and conventional methods, such as delay and sum and superdirective beamforming, are compared. The effectiveness of the methods for identifying significant reflectors and, ultimately, assessing noise control strategies is examined.La formation de faisceau globale est d\ue9crite comme une solution de rechange \ue0 la formation de faisceau traditionnelle, qui permet de r\ue9duire la complexit\ue9 du mat\ue9riel des r\ue9seaux constitu\ue9s de nombreux \ue9l\ue9ments. On a con\ue7u un r\ue9seau sph\ue9rique de 32 \ue9l\ue9ments servant \ue0 l'analyse des variations directionnelles et spatiales des champs acoustiques dans une pi\ue8ce. On combine les deux techniques dans le but de localiser les premi\ue8res r\ue9flexions dans une pi\ue8ce. On compare la m\ue9thode de rechange de formation de faisceau et certaines m\ue9thodes classiques, telles que la formation d'un faisceau \ue0 action retard\ue9e, d'interrogation ou superdirectif. On examine l'efficacit\ue9 des m\ue9thodes servant \ue0 d\ue9terminer les r\ue9flecteurs importants et, en bout de ligne, \ue0 \ue9valuer les strat\ue9gies de lutte contre le bruit.Peer reviewed: YesNRC publication: Ye